The medal races at the recent UK "Sail for Gold" event had real time tracking and radio commentary. This is a link to the Tornado tracking:-

http://www.cowesweektracking.com/racePlayer/player.aspx?race=37

Let it load, then press play, the race doesn't start for a long while so you can speed it up then slow it down again when the race starts. After zooming in you can move the course by clicking the background and dragging etc. Hover mouse over boat to see who it is. It was very windy...

Other links:-

www.ryaevents.org.uk/sailforgold
www.traxu.com

http://www.yachtsandyachting.com/photos/...;p=&yr=2006